Quiz: Demonstration problem on text page 119
Since the table is symmetrical about its mean ( = 0 ), one can enter the table at Z = + 3.0 to get a probability area of 0.9987 and subtract this result from 1.000 to obtain 1.000 - 0.9987 = 0.0013 Which is the probability area to the left of Z = - 3.000
\ 0.13% will be too narrow